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complete circuit or a closed circuit
one wire connects the base lightbulb to one end of the D-cell. the second wire connects the metal casing of the light bulb to the other end of the D-cell. this result in a bright shining lightbulb
the place on a D-cell and lightbulb were wires touch the component are called contact point.
the current flows from first lightbulb then goes second lightbulb. sharing the cell or the source of electricity
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